JPH07211177A - Switching device - Google Patents

Abstract

PURPOSE:To decrease the number of component parts constituting a link mechanism to a great extent by forming each lines from a single link plate in a switching device. CONSTITUTION:Pins 41, 42 are inserted from one side at each end of a link plate 40 and welded and the first link member 43 is provided, wherein the pin 41 penetrates the tip of a lever 17 from the right. Another pin 45 is inserted through only the top of a link plate 44 and welded and the second link member 46 is provided, and a fixing pin 25 is allowed to penetrate the bottom of the link plate 44, and the pins 42, 45 are protruded to the left. These pins 42, 45 are allowed to penetrate the top and bottom of a link plate 48 as a third link member through a roller 47, and the pins 42, 45 are coupled. A nut 49 is screwed on the tips of pins 41, 42, 45 and fixing pin 25, and bearing 50 is provided between the lever 17 and pin 41, between link plate 48 and pins 42, 45, and between link plate 44 and fixing pin 25. Accordingly the number of component parts of the link mechanism of a switching device is decreased, while the assembling works can be facilitated as well as the man-hours for assembly be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing device and an improved link mechanism for operating the opening / closing part.

[0002]

2. Description of the Related Art The operation and structure of a conventional switchgear are shown in FIGS. As shown in FIG. 2 (a), when the fixed lead rod 2 and the movable lead rod 3 of the vacuum interrupter 1 serving as the opening / closing portion are separated from each other and the operating shaft 4 is rotated half a counterclockwise direction, the operating shaft is rotated. The closing spring 7 provided between the fixed shaft 6 and the arm 5 which is integral with 4 is compressed, and the closing spring 7 is released when it passes the top dead center. The rotation of the operating shaft 4 is shown in FIG.
The eccentric shaft 24 fixed to the output shaft 23 is rotated to reciprocate the claw 8 in the vertical direction, and the claw wheel 9 is gradually rotated counterclockwise. The operation shaft 4 is provided with a one-way clutch (not shown).
Does not turn clockwise.

At a position just after the top dead center, a closing hook is engaged with a notch of a rotating body (not shown) which is integral with the operating shaft 4 to stop the rotation of the operating shaft 4. When the closing hook is removed. , The closing cam 11 integrated with the operation shaft 4 is half-turned from the position shown in FIG. 2A by the releasing force of the closing spring 7, and one end thereof is rotatable via the fixed shaft 25 as shown in FIG. 2B. The link mechanism including the link 12 fixed to the link 13, the link 13 having one end supported by the stopper 35 and the other end supported by the pull-out hook 15, and the link mechanism 14 are extended substantially linearly by pressing. Then, the lever 17 rotates clockwise around the main shaft 16 and pushes the movable lead rod 3 upward through the pressure contact spring 18, the insulating rod 19, and the rotating plate 20, and the vacuum interrupter 1 is inserted. At this time, since the rod 21 having the upper end coupled to the portion of the lever 17 extending to the right is pushed downward, the shut-off spring 22 is compressed to store energy.

When the trip link 15 is rotated clockwise from the closed state of FIG. 2 (b), the blocking spring 22 releases the lever 17 so that the lever 17 rotates counterclockwise.
As shown in (c), the movable lead rod 3 is lowered and the vacuum interrupter 1 is cut off. This is because the link mechanism including the links 12, 13, and 14 that have been linearly extended can be bent.

FIG. 3 is a detailed view of a portion of the link mechanism,
FIG. 4 is a view on arrow AA of FIG. The pair of levers 17 are integrally welded through the cylindrical member 25, and the pin 28 is inserted into the cylindrical member 25 through the spacer 26 and the pair of bearings 27.
One end of a pair of link plates 14 is supported on both ends of the.
The other end of the link plate 14 is connected by a pin 29, and one end of a pair of link plates 13 is supported by the pin 29 with the roller 30 sandwiched therebetween. The other ends of the pair of link plates 13 are rollers 31.
Are connected to each other via a pin 32, and one ends of a pair of link plates 12 are supported on both ends of the pin 32. A bearing 27 is interposed between both ends of the pair of link plates 13 and the pins 29 and 32. The other ends of the pair of link plates 12 are supported by the fixed pins 25. In addition, 33 and 34 are spacers.

[0006]

However, since the link mechanism part uses a pair of link plates as one link, there are four parts in the pin-bonded part.
Since one link plate and two bearings are provided, the number of parts increases, the cost of the switchgear increases, and it becomes an obstacle to downsizing.

Further, since the link mechanism is assembled by fitting the link plates from both sides of the pin, the number of assembling steps is large and the assembly by the robot is difficult.

Therefore, an object of the present invention is to provide an opening / closing device that solves the above problems.

[0009]

The structure of the present invention for achieving the above object is to connect three links so that the tip of a lever for opening / closing the opening / closing portion and a fixed shaft are rotatable. By interlocking, the stoppers and tripping hooks for restraining the central one of the three links from moving to one side are provided at one end and the other end of the central link, while the central link is provided. A push-in cam that closes the open / close part by rotating the lever by pushing one end of the arrow toward the stopper and extending the three links in a substantially straight line is provided, and a shut-off spring that biases the lever in the direction in which the open / close part is opened is provided. In the opening / closing device, the first link member is formed by integrally forming the projecting shafts projecting in the same direction at both ends of the link plate, and one shaft of the first link member is passed through the lever, so that only one end of the link plate Integrated protruding shaft A second link member is formed and the fixed shaft is passed through the other end of the second link member so that the projecting shafts of the opposing ends of the first link member and the second link member project in the same direction. The projecting shafts of the opposite ends of the first link member and the second link member are passed through both ends of the third link member composed of only the link plate.

[0010]

In order to assemble the link mechanism portion of the opening / closing device, the pins of each link member project in the same direction, and the pins are integrally connected to the link plate, so that the assembly is performed only from one side. It will be. Since one link member is composed of only a single link plate, the assembling work of the switchgear can be performed in a shorter time and more easily than in the conventional case.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

Since this embodiment is an improvement of a part of the conventional switchgear, the description of the same parts as the conventional one will be omitted.
Only different parts will be described.

The structure of the link mechanism portion of the opening / closing device according to the present invention is shown in FIG. 1 in correspondence with FIG. As shown in the figure, the pins 41, 4 are attached to both ends of the link plate 40 from the same direction.
The first link member 43 is welded by penetrating 2
Is provided, and the pin 41 penetrates the tip of the lever 17 from the right side in the drawing. Further, the second link member 46 is provided by penetrating and welding the pin 45 only to the upper end of the link plate 44, and the pin 42 and the pin 45 are formed by penetrating the fixing pin 25 to the lower end of the link plate 44. It is provided so as to project to the left inside.

The pins 42 and 45 have rollers 47, respectively.
Is inserted, and the pin 42 is connected to the pin 42 by penetrating the pin 42 at the lower end while penetrating the pin 42 at the upper end of the link plate 48 as the third link member.

A nut 49 is screwed to the tips of the pins 41, 42, 45 and the fixed pin 25, and the lever 17 and the pin 41 are attached.
Bearings 50 are provided between the link plate 48 and the pins 42 and 45, and between the link plate 44 and the fixed pin 25. 51 is a color. A bush may be used instead of the bearing 50.

Next, the operation of the opening / closing device will be described. To assemble the link mechanism of the opening / closing device, the lever 17 and the fixing pin 25 are attached to the first link member 43 and the second link member 4.
After attaching 6, the rollers 47 are attached to the pins 42 and 45, respectively, and the link plate 48 is attached. Then, nuts 49 are screwed into the pins from the left side of FIG. Since the right end of each pin is integrally welded to the link plate, the link mechanism can be assembled by only the work from the left side of FIG.

[0017]

As can be seen from the above description, according to the opening / closing device of the present invention, a single link plate constitutes one link, so that the number of link plates used is half that of the conventional one.
The number of parts that make up the link mechanism is significantly reduced compared to the past. Therefore, the number of assembling steps of the opening / closing device is reduced, the manufacturing cost of the opening / closing device is reduced, the width of the link mechanism is reduced, and the opening / closing device can be downsized.

Further, since the link mechanism can be assembled by work on only one side, assembly by the robot is facilitated and the number of assembly steps is reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a link mechanism of an opening / closing device according to the present invention.

FIG. 2 is an operation explanatory view of a conventional opening / closing device.

FIG. 3 is a configuration diagram showing a link mechanism of a conventional opening / closing device.

FIG. 4 is a view on arrow AA of FIG.

[Explanation of symbols]

 17 ... Arm 25 ... Fixed pin 40, 44, 48 ... Link plate 41, 42, 45 ... Pin 43 ... First link member 46 ... Second link member

Claims (1)

[Claims] 1. A tip of a lever for opening / closing an opening / closing portion and a fixed shaft are interlockedly connected by rotatably connecting three links, and a center one of the three links is connected. While a stopper for restraining the movement to one side and a release hook are provided at one end and the other end of the center link,
3 by pushing one end of the center link towards the stopper
In the opening and closing device that has a closing cam that extends the link of the book in a substantially straight line and rotates the lever to close the opening and closing part, and a blocking spring that biases the lever in the opening and closing part A first link member by integrally forming a projecting shaft projecting in the direction, one shaft of the first link member is passed through the lever, and the projecting shaft is integrally formed only at one end of the link plate to form the second link. A member is provided and the fixed shaft is passed through the other end of the second link member so that the projecting shafts of the opposite ends of the first link member and the second link member project in the same direction, and only the link plate is provided. An opening / closing device characterized in that projecting shafts of opposing ends of the first link member and the second link member are passed through both ends of the third link member.